Improvement in metallurgic gas-furnaces



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Metau @mijn 2022321,

No. Patened Aug. 20,18273.

L @5M W@ V I L L I'A M SVI I) E L L, (l ll" A. L L E (i 1I E N' Y, l ,l X

NHAYLYANIA.

IMPROVEMENT un METALLURGIC GAS-FURNACES.

Specification forming part of Letters Patent No. 207,22 i, dated August 20,1379; applienlion filed t March 2li, 187e.

ro all whom it may boncern:

Beit known that I, WILLIAM SwiNDnLL,

of Allegheny, in the county of Allegheny and State of Pennsylvania, have invented a new v and useful Improvena-nt in l\l`etallurgic Furing drawing, forming part of this specification,

Figure 1 is a side elevation of-a metallurgie furnace embodying my invention. Fig. 2 is a horizontal section on the line c c, Fig. l. Fig. 3 is a similar section on the line fw vv, Fig. l. Fig. 4 is a vertical transverse section on the linexx, Fig. 1. Fig. 5 is a vertical longitudinal `ection on the line 1/ y, Fig. 2. Fig. 6 is a simi ar section 011 the line z z, Fig. 2.

Like letters refer to like parts wherever they occur.

My invention relates to the construction ot metallurgie furnaces, is especially adapted to the use of gaseous fuel, and in some respects is an limprovement on Letters latent No. 165,630, granted to me July .18, 18,75.-

My invention consists i-n the construction ot metallurgie furnaces with hollow bosh and back Walls, and connecting the same with the regenerator; in the construction of the and air inlets with hoods or nozzles; and in a special arrangement of the dampers, all of which enables space to be utilized and the furnace to work steadily at higher heats without 'material injury to the structure, as will hereinafter appear. y

In the construction of long or double puddling-hearths, the common practice has been to place the worhingdoors upon opposite side.' ofthe furnace; but such an arrangement interferes to some extent with thefproper draft 0f the furnaee,.and is disadvantageous to the Workmen on account of the crossing and `interference of the tools in working the molten met-al, and the ditlieulty of dividing and balling the metal equally, to overcome which objections lplaee the two working-doors on the -same side, and thereby gain the further advantage of being able to double the structure, saving much space. I have also found that where the air and gas enter side by side, or in parallel lines, the combustion is more or less incomplete; and that where the air-supply is cnt ott' at a point distant from the hearth, the air-lines are exhausted ol' air, and are liable to be injured by the heat;- and to overleome these dilliculties l` have arranged the air-llucs so that `they dip and discharge around the gasexits, which are .:entl'aeted and arranged cen trally, and have' arranged the dampers ofthe air-lines at or near their discharge ends, so` that, the communication with the exterior being retained, the vlines remain filled with air andare in a measure protected.

I will now proceed to describe my invention, so that others skilled in the art towhieh it appertains may apply the same.

A A represent the hearths of two pnddlingfurnaces inclosed within the same walls, each hearth heilig about twice the usual. length, or what may be termed a double hearth. and each provided with two working-doors, a c', located in the same side of the furnace. lt' desired, a single hearth, A, and its adjunets may be constructed in the manner hereinafter set forth; but to obtain. the best results and conserve the heat, I prefer to build in duplicate, as shown. The back wall of the furnace (or furnaces) is built hollow, as shown at I), l, andcommunicates with the spaces around the boslles "ol" hearths A, with the hot-air ilucs spanning the furnace, and with the space. beneath the heart-h. The spaces beneath the lhearth are divided by cross-walls c d in 'such manner that the air entering port c is ecmpelled to t 'avel the length ol' the hearths and enter return-passagesj' j" before reaching the hollow back walls [i b.

(lis an arch spanning the furnace, and divided into alternate air tlues or passages y and conibustionlues h, as described in Letters latent above recited, and also fully set forth in a second application of even date herewith. The llucs g eonununicate at one end with the hollow baci; walls I; I), and at the other with the puddling l earth A, directly over and around the tlu's for the admission of gas.

The gas employed is conducted from a producer or producers, or from any suitable source of'supply, to tluc 7:, which delivers it through ports/t" to the exits l, inline with the mouth of theair-llues. The exits l of the gas= t ues are constructed in nozzle form, either by l building; in U or V shaped lire-brick or in equivalent way, the object being to divide the air and canse it to envelop the gas at the time the latter enters the furnace, so as to insure a full supply of air to facilitate the combustion of the gas. rlhc ports 'i are provided with suitable dampers u, so that the gas from the producers can be regulated as to volume, or cut off entirely, it' desired. i

All the month of the air-ports, and just over the gas-exits I, are a series of dampers, m, by means of which the quantity of air admitted to the hearth can bc regulated and adjusted with relation to the volume 'of gas, or can be cut ofi" entirely.

The operation of my improved furnace is as follows: lthe dampcrs a havin g been set to permit the desired volume of gas to pass from the producer to `the hearth, the gas will issue from the nozzles in a thin stream and unite vnate liucs h) and vfinally be delivered onto the hearth around the gascxits-7 mingling with the gas to supportcombustlon. The products of combustion escape from the hearth through arch-fines h, as before specified.

thorough manner in which combustion takes place.

Having thus described the nature and advantages of my invent-ion, what l' claim, and

desire to secure by Letters Patent, is

1'. ln a metallurgie furnace ofthe class specitied, the hollow back walls and bosh communicating with the regenerator-llues, substantially as and for the purpose speciflcd.

2. rlhe combinatiomwith the hearth or combustion-chamber of a metallurgie furnace, ot' the airdcli\ery ports, inclosing the contracted gas-delivery ports, and the dampers m n, located with relation to said ports, as specified, and adapted to regulate the admission of air and gas to the hearth, the whole constructed and arranged substantially as specified.

In testimony whereof I, the -said XVILLIAM SwlNDELL, have hereunto setiny hand lV-I LLL/YM S \VIN1).EL1.

Witnesses:

l?. W. Rrrr1nt, Jr., A. C. J ouus'roN. 

